中文摘要：

本试验通过设置不同磷酸根浓度、 pH和不同电解质及电解质强度梯度，研究磷酸根在针铁矿-胡敏酸（HA）复合物和赤铁矿-胡敏酸（HA）复合物表面的吸附特性。X射线衍射（XRD）、 扫描电镜（SEM）和红外光谱（FTIR）图谱显示： 铁氧化物包覆胡敏酸后其内部结构特性保持不变; 氧化铁与胡敏酸通过氢键形成粒径大、 表面光滑的铁氧化物-HA复合微粒，且复合物比表面减小; 形成的氧化铁-胡敏酸复合物对磷的吸附能力增强，且针铁矿复合物的吸附能力大于赤铁矿复合物，均为多层吸附过程; pH增高抑制铁氧化物复合物对磷的吸附，同时电解质浓度增加促进复合体对磷的吸附，且反应后体系pH随之降低。

英文摘要：

Phosphorus adsorption characteristics of the goethitehumic acid （HA） compound and hematiteHA compound were studied by the batch experiments with different phosphate concentrations, pH and different ionic strengths. The results of the X-ray diffraction （XRD）, scanning electron microscopy （SEM） and Fourier transform infrared spectrometer （FTIR） show that the structures of iron oxides are not changed when they are coated with humic acid, while the iron oxides and humic acid generated iron oxideshumic acid compounds have larger particles and smooth surface by the H bond. These compounds have stronger adsorption capacity of phosphorus and larger specific surface area than those of the oxides. The phosphate adsorption amount of goethite-HA compound is larger than that of the hematite-HA compound, and the adsorption is multilayer. The increase of pH could inhibit the phosphate adsorption, while the increase of ionic concentration could enhance the adsorption.